Pdsch type b gain. phy5g. The app automatically obtains the baseband sample rate – CDM type parameter, if the UE is configured with higher layer parameter eMIMO-Type, and eMIMO-Type is set to ‘CLASS A’ for a CSI process. 1-2 of TS36. Time-Frequency Resource Allocation: Both PDSCH and PDCCH reference specific time-frequency resources in the LTE downlink. Type 0 PDCCH Common Search Space is a subset of NR PDCCH Search Space that is dedicated to transmit the PDCCH for SI message (SIB). 77 dB but PDSCH type B -1. Further, in the case of PDSCH DM-RS, the same operation as to PDSCH data stream is performed. This article "LTE Throughput Optimization: Part 2 - Spectral Efficiency" explains data part (PDSCH) of the LTE subframe and discusses various ways to improve its efficiency. Toggle Main Navigation. The LTE network allocates these resources to ensure that UEs can reliably access PDSCH for user data and PDCCH for control information. The different reference signals are separated in the frequency and PDSCH is an acronym for Physical Downlink Shared Channel, which is a type of channel used in LTE and 5G networks to transmit data from the base station to the mobile devices. Therefore, what I am going to explain on this page is related to transmitting/decoding SIB1 in SA(Standalone) mode. This example supports both wideband and subband precoding. PDSCH (Physical Downlink Shared Channel) PDSCH is a physical channel that carries user data. txt) or read online for free. PDSCH - Time Domain Allocation (DCI - PDSCH Timing) : K0. QPSK is a type of modulation that is particularly efficient in terms of spectrum usage because it transmits two bits per symbol, which is represented as a complex number. < 38. where Format 1 0 is more suitable for a multicast/broadcast case as it is dedicated for DL cells. PDSCH and PDCCH Transmission Process: 4. High modulation orders are required to tranfer high throughputs in good coverage, whjile low modulation orders are required to maximize When the subcarrier spacing of PDSCH and PDCCH is different, the time delay between DCI slot and PDSCH slot is a little bit complicated as shown below, but when the subcarrier spacing of PDSCH and PDCCH is same the time delay between DCI slot and PDSCH slot becomes K0. Therefore, in our simulation, we consider SISO only. 211 section 7. NCellID = 0; % Cell identity waveconfig. Instead of being restricted to transmissions being 2, 4, or 7 symbols long, PDSCH mapping type B has been extended to support any lengths from 2 to 13 as described in Chapter 9. These types are characterized by DMRS type (PDSCH DMRS type and PUSCH DMRS type) and SLIV table as shown below. This example shows the different stages involved in the Downlink Shared Channel (DL-SCH) and Physical Downlink Shared Channel (PDSCH) processing and provides access to the data from these intermediate stages. In previous releases, the valid antenna port numbers range from 0 to 11 4. TS 38. e. 2 dBm), in Ericsson RS power is set implicitly by the total cell power and CrsGain. The Physical Downlink Shared Channel (PDSCH) is the physical channel that carries the DL-SCH coded data. When a new PDSCH is added, the new PDSCH will have First Symbol, Last CRS gain configuration should be separate area coverage ,deep indoor or capacity area Recommendation value for PA and PB PB PA Remark 0 3 RS -3dB but PDSCH type B +1dB 1 0 RS &amp; PDSCH having same power (Existing Network) 1 -1. 5 dB over the one with a PDSCH code-rate of 616/1024 when using 64-QAM. Modulation and Coding Scheme (MCS): The modulation and coding scheme for the PDSCH determines how the data is modulated and encoded before transmission. 306 [1]) allows, HS-DSCH transport blocks can be scheduled to the UE For estimating the MIMO channels for both the uplink and the downlink, we used residual deep neural network. I don't find much details on this as of 36. Detected the following cells: Meaning -- DPX:TDD/FDD; A: #antenna ports C: CP type ; P: PHICH duration ; PR: PHICH resource type DPX CID A fc freq-offset RXPWR C nRB P PR CrystalCorrectionFactor TDD 253 2 1890M -48h -17 N 100 N 1/2 0. The EVM is measured as defined in TS 38. 5G Waveform Simulation Parameters. the signal quality and the network capacity thanks the high gain beams pointed toward users. Add PDSCH - Adds a PDSCH to the transmission. Low peak-to-average-power ratio (PAPR) transmissions significantly improve the cell coverage as they enable high power transmissions without saturating the power amplifier. 3-0 : PDSCH transmission scheme assumed for CQI reference resource - Rel 8 > < 36. Saved searches Use saved searches to filter your results more quickly This example describes the blind search decoding of the physical downlink control channel (PDCCH) for 5G New Radio communications system. pdsch. Since the Blood Type B Diet emphasizes calorie-rich foods such mutton, goat and Let's dive into the technical details of PTRS (Phase Tracking Reference Signal) and PDSCH (Physical Downlink Shared Channel) in the context of cellular communication systems, specifically LTE (Long-Term Evolution) or 4G. The design of reference signals is described in Section VI, followed by our concluding remarks in Section 0. PRBSet starts as 2. Signalling Radio Bearers(SRB) will use PDSCH. Following description is all for now. transport block) processing through 5G NR physical layer modules or blocks. Rel-15. The bandwidth of the PDCCH can vary based on system bandwidth. 213-Table 7. 6. The performance gain that a Multiple Input Multiple Output (MIMO) scheme provides to the system, in comparison with Single Input Single Output (SISO), can be approximated using the MIMO model in ns-3 [4]. You switched accounts on another tab or window. 1 Resource allocation in time domain. So, if the PDCCH resources are reduced then that means that the PDSCH resources can increase which in turn The details about the implementation of the DMRS sequence for PBCH, PDCCH and PDSCH are provided in section 7. The PDSCH has Downlink Control Information (DCI) code words of varying length based on the LTE specifications such as DCI format and bandwidth. 7. 9、 pb=b类pdsch的符号功率/ a类pdsch的符号功率。pb是小区级参数，一旦配置就不会改变。这就意味着b类pdsch的符号功率需要随a类pdsch的符号功率的变化而变化，已达到pb的不变。 需要重点强调的是上述两个公式代表的是一种对应关系，并不是绝对意义上的比值 shared channel (PDSCH) and physical uplink shared channel (PUSCH) in Section IV, and physical downlink control channel (PDCCH) and physical uplink control channel (PUCCH) in Section V. 4. From 3GPP Rel 13, a new frame structure (Frame Structure Type 3) and major application of this type is LAA. 5. In the leftmost pane of the app, you can set the parameters for the selected waveform. 2 [1] . 211 V13. The mapping type of PDSCH is either slot-wise (type A) or non-slot-wise (type B). In SIB1 4. It is used to transmit downlink user data, control information, and system information from the base the power of PDSCH type A is equal to -3 + 18. The PDSCH channel is used to carry DL user data, UE specific upper layer informations (layer-2 and above), system informations and paging. Carries user specific data (DL Payload). LTE eNodeB selects suitable modulation type based on adaptation algorithm. MappingType = 'A'; % PDSCH mapping type ('A'(slot-wise),'B'(non slot-wise)) pdsch{1}. 77 dB 1 -3 RS +3 dB (2x2MIMO) 2 -4. 3-0 : PDSCH transmission scheme assumed for CQI reference resource - Rel 12 > The configuration type is determined by rbg-size field in PDSCH-Config in a RRC message. These services support a wide range of applications and usage scenarios in CRS gain configuration should be separate area coverage ,deep indoor or capacity area Recommendation value for PA and PB PB PA Remark 0 3 RS -3dB but PDSCH type B +1dB 1 0 RS &amp; PDSCH having same power (Existing Network) 1 -1. PDSCH is the main channel that carries user data, such as voice, video, or web browsing, as well as some system information, such as paging and RRC signaling For Type-0/0A/1/2 CSS, PDCCH and PDSCH are both on PCell, hence self-scheduling; For Type-3 CSS, depending on RRC configuration, it could be on PCell Once the specific scenario and the performance gain have been identified, we can further discuss the technical aspects(e. DMRSPower = 0; % Additional power PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel) mapping types in the context of 4G LTE and 5G NR. 参考信号间的QCL关系 5G PDCCH is used to carry Downlink Control Information (DCI), and following types of DCI are supported in NR. 2 Mapping to physical resources paragraph of 3GPP TS 38. g. The Physical Downlink Shared Channel (PDSCH) is the supreme data-carriage downlink channel in Long Term Evolution (LTE). Case1: when full slot is allocated for PDSCH data, By default position of This is related to the row 'Type A' in PDSCH SLIV table. The frequency hopping scheme is designed to mainly pursue the equal frequency diversity gain for the uplink transmission You signed in with another tab or window. CDM group . 10. In addition, 5G must support an extremely wide frequency range from below 1 GHz to above 50 GHz, which includes the frequencies that have gain and frequency domain diversity. LNCEL:dlrsboos t = 0dB LNCEL: 9. According to the should be considered in the system level simulation. 1-1: Supported PDCCH aggregation levels, for Type0, Type0A and Type2 PDCCH CSS, the CCE aggregation levels and the number of PDCCH candidates per CCE aggregation level are given in Table 10. Power from blanked RS utilized for PDSCH symbols B boosting. Label = 'DL carrier 1'; % Label for this downlink waveform configuration waveconfig. Support scaling factor 0. New Radio In 5G NR, even in the current latest version of the 3GPP document TS 38. 2 dB 3 -6 RS +6 dB In PDSCH, there is no Precoding step in channel processing, but there is Precoding stage in PUSCH channel coding process. * PDSCH assignments to convey TB(s) to a certain UE, including time/frequency-domain resource information The nrWavegenPDSCHConfig object sets physical downlink shared channel (PDSCH) configuration parameters, as defined in TS 38. In this paper, different modules of Transceiver architecture channels of type HS-PDSCH. The current available DCI formats specified for PDSCH scheduling are shown in Table III. Support resource allocation Type 0 for PUSCH. Instead, Type A and T PDSCH mapping type B is used for starting the PDSCH anywhere in the slot, with a duration of 2, 4, or 7 OFDM symbols. Then split the interpolated image into its real and imaginary parts and input these images together into the neural network as a single batch. If UE category (indicating the UE capabilities as specified in 3GPP TS 25. NR-PDSCH, which stands for New Radio Physical Downlink Shared Channel, is a crucial component of 5G NR (New Radio) wireless communication PDSCH has most of the utility to support numerous MIMO transmissions, Hybrid Automatic Repeat Request (HARQ), MAC layer scheduling, and many additional functions. , 1-a~1-g) that need to be investigated. As can be seen, it consists of reference symbols of predefined values inserted within the first and third last 6 OFDM symbol of each slot and with a frequency-domain spacing of six subcarriers. The DM-RS for PDSCH mapping type B is extended to provide additional flexibility in scheduling only part of a slot. Therefore, in Release 16, PUSCH repetition Type B in Fig. But if the UE sends ACK/NACK, then that means by itself that PDCCH was decoded successfully, only then, the UE can get the location Why is there such a difference? In both 4G-LTE and 5G-NR systems, same-slot scheduling is always supported as the baseline. To balance the precoding gain and channel estimation performance, the concept of REG bundle was CrsGain - Free download as Word Doc (. Displays the modulation type for the selected physical channel. In some adverse cases, this cross – mMTC –Machine type communications – Internetworking with non-3GPP systems (e. 77 RS +4. Followings are those parameters in RRC. DL-SCH PDCCH Tx Setting and Configuration (Advanced LTE-A TDD Downlink) Select the DCI channel in the Channel Setup node, then click the button in the DCI #n for DL-SCHn Scheduling cell to open the DL-SCH PDCCH Tx Setting window (i. In [8], PDCCH repetitions are generated by puncturing PDSCH of the This corresponds to two different mapping types: mappings type A and B. For any communication technology, Modulation and Coding Scheme (MCS) defines the numbers of useful bits which can carried by one symbol. For mapping type A, DM-RS assigned symbol 2 or 3 of the slot, while for mapping type This parameter is adjusted based on the following table when the RS transmit power is boosted to balance power between the orthogonal frequency division multiplexing (OFDM) symbols of the PDSCH type A and the OFDM symbols of the PDSCH type B. 2 [1]. 22, = 15. This example shows how to use 5G Toolbox™ features to model a 5G NR Type B: PDSCH resource elements in the same symbol as Reference signal resource element. 1-1: CCE aggregation levels and If the scheduling DCI is configured to indicate the downlink resource allocation type as part of the 'Frequency domain resource assignment' field by setting a higher layer parameter resourceAllocation in PDSCH-Config to 'dynamicSwitch', for DCI format 1_1 or setting a higher layer parameter resourceAllocationDCI-1-2 in PDSCH-Config to 'dynamicSwitch' 对于上表其他的都没什么好说的，但是有一个Support for restricted set（TypeA，TypeB）需要解释下。从表中可以看出，只有SCS比较小的（1. One HS-DSCH transport block is transmitted in a transmission time interval (TTI) of 2 ms (corresponding to 3 timeslots). Mapping Type: PDSCH can be mapped using either Type A or Type B: Type A is typically used for more static and predictable traffic patterns, offering regular periodicity. This helps determining the first DM-RS symbol position. 2 . pdf), Text File (. This function also Physical Downlink Shared Channel (PDSCH): Function: PDSCH is used to carry downlink user data, including both user data and control information. 1 PDSCH type A This page describes PDSCH or Physical Downlink Shared Channel with respect to WCDMA/UMTS system. 6- PDSCH – for PDSCH mapping type B, is the duration of the scheduled PDSCH resources. It describes processing of PDSCH and PUSCH channels through 5G physical layer. Wireless communications make it simple to send data from a disseverment without links or wires. 3 - Table 5. Both mapping types A and The system with a PDSCH code-rate of 378/1024 provides an SNR gain of 5. at the Node B, with a time constant of 30 Transmission Time Intervals (TTIs). Higher Layer is displayed in the Data cell if the selected physical channel is controlled by a channel defined in the Transport Channel layer. For a more detailed explanation of the steps implemented in this example, see Model 5G NR Communication Links and DL-SCH and PDSCH Transmit and Receive Processing Chain. Table 7-1 Mapping between the multiple that the RS transmit power is boosted and ρB/ρA. Channel Purpose: * The PDSCH is used to transmit PUSCH mapping type (Type A or Type B) to be applied in the PUSCH transmission. This means that a block of REs is This is related to the row 'Type A' in PDSCH SLIV table. Since this is the Read the full whitepaper Introduction Operators across Europe, Asia and North America have been commercially launching 5G services at an incredible Note 1: only permitted when DFT-S-OFDM waveform is selected for PUSCH Note: PUSCH and PDSCH are responsible for transferring data. As compared to LTE, we do not use cell reference signals in NR. 25kHz，5kHz）才会有约束限制集的考虑，因为此时更容易受到频偏的影响，所以在生成preamble的时候需要考虑到频偏带来的影响，更具体的可以根据preamble生成公式看到 The On-board Train Control System (OTCS) plays an important role in the real-time operation of the electric multiple units (EMU) in high-speed railway. When a new PDSCH is added, the new PDSCH will have First Symbol, Last In the new generation of communication technology 5G, estimation of the Physical Downlink Shared Channel (PDSCH) is performed by demodulated reference signal (DMRS) and channel state information reference signal (CSI-RS) based on 3GPP standards. It provides efficient and reliable delivery of user data In the new generation of communication technology 5G, estimation of the Physical Downlink Shared Channel (PDSCH) is performed by demodulated reference PDSCH Aggregation is a kind of PDSCH repetition mechanism for reliable transmission (of course at the sacrifice of throughput). Practical synchronization performs a cross-correlation % Antenna port and DM-RS configuration (TS 38. waveconfig = nrDLCarrierConfig; % Create a downlink carrier configuration object waveconfig. The precoding matrix is determined using SVD by averaging the channel estimate across all PDSCH upon channel bandwidth the amount of accessible RBs in the frequency domain changes. 9725919 Corpus ID: 247387188; Performance Evaluation of MIMO System in Different PDSCH Modulation Type for Wireless Communication Using 20MHz Channel Bandwidth high gain beams. In addition, the slot aggregation in time domain for PDSCH transmission is supported to improve the coverage. pc_ra_Type0_PUSCH. It is responsible for transmitting Product Updates. PUSCH DM-RS: NR supports a common DMRS structure for UL and DL (PDSCH and PUSCH). You signed out in another tab or window. 104, Annex B(FR1) / Annex C(FR2). The modern wireless communication (4G/5G) framework required lower power consumption, high speed data transfer rate, and bandwidth efficiency. However, determining TBS (Transport block size) in NR is more complicated than the one in LTE. You determine the precoding matrix by using SVD and averaging the channel estimate across all PDSCH This corresponds to two different mapping types: mappings type A and B. Skip to content. DMRSConfigurationType = 2; % DM-RS configuration type (1,2) This part will be described in a separate page titled Resource Allocation Type. You determine the precoding matrix by using SVD and averaging the channel estimate PDSCH (LTE-Advanced) Menu Path: Trace > Data > CCx > Demod > Frame Summary where x specifies the component carrier PDSCH is the Physical Downlink Shared Channel. The PDSCH is responsible for carrying downlink data from the base station (eNodeB or gNB) to the user equipment (UE). The modulation scheme for each PDSCH for each user is determined by MCS CRS gain configuration should be separate area coverage ,deep indoor or capacity area Recommendation value for PA and PB PB PA Remark 0 3 RS -3dB but PDSCH type B +1dB 1 0 RS &amp; PDSCH having same power (Existing Network) 1 -1. 15. Article09 May 2015. Carries Random Access Response Message in case of PDSCH mapped to RACH channel. as described above the CRC power is defined by the reference signal power. Time-domain location of DM-RS. Mostly same channels: data, control, broadcast, random access Two operating modes: FDD and TDD (*) OFDM-based (**) but with different PDSCH plays a crucial role in downlink data transmission in LTE and 5G wireless communication systems. Furthermore, not all patterns illustrated in Fig. PB. 0. 1- PDSCH DMRS Configuration Type 1 or Type 2 . Channel Estimation and Symbol Equalization for the Physical Downlink Shared Channel (PDSCH) are vital processes for ensuring reliable and efficient communication. (Hz) and Gain (dB). WiFi) – Vehicular communications – Multicast services and multimedia broadcast – Unlicensed spectrum access P IN SCOPE X OUT OF SCOPE (e. communications (URLLC), and massive machine type communications (mMTC), are supported [2-3]. The figure shows a configuration with PDSCH occupying the OFDM symbols from The Physical Downlink Shared Channel (PDSCH) is the physical channel that carries the DL-SCH coded data. In previous releases, the valid antenna port numbers range from 0 to 11 and the nominal value depends on the DM-RS configuration type and DM-RS symbol duration. PDCCH and PDSCH configured by P-RNTI (Table 7. The proposed residual deep neural network (ResNET) channel estimation outperforms the MMSE channel estimation by more than 2 dB under EPA uplink channels and is capable of operating on untrained wireless channels. DMRSPower = 0; % Additional power boosting in dB pdsch{1}. Let us understand PDSCH channel data (i. A B / Whereas Mapping Type B is sometimes referred to as providing ‘Non-Slot’ based Scheduling or ‘Mini Slot' based scheduling’ (Mapping Type B is restricted to allocating up to 7 symbols) PDSCH Type A First DMRS is located in Symbol 2 or 3 of the slot; PDSCH Type B is always located at the first Symbol of PDSCH Allocation. 6% gain 1. 38. The Applicable PDSCH Time Domain Resource Allocation . PDSCH和PUSCH时域资源的映射类型有两种：Type A和Type B。Type A是基于时隙的调度，Type B是基于微时隙的调度。如前所述，Type B调度的主要目标是支持uRLLC业务。Type A调度的起始符号位置可以是0、1、2、3，Type B调度的起始符号位置可以是任意的符 with one or two CRS antenna ports, and 12 RE per RB *(11 symbols available for PDSCH – 4 CRS symbols muted within NR slot) = 84 REs available for NR PDSCH with four CRS antenna ports. The HS-PDSCH scheduler selects the transport block size based on the filtered CQI value and an outer loop algorithm While the full list of possible CCE aggregation levels is already defined in TS 38. Based on a standard LTE subframe, with the LTE control channel and CRS present, assuming the scheduler does not schedule any PDSCH, the Type A, starting from the 3rd of 4th symbol in the slot, and Type B, starting from 1 st symbol on scheduled PDSCH and is practical only for cases there is no CORESET on the 1 st OFDM symbol. You determine the precoding matrix by using SVD and averaging the channel estimate The Precoding Matrix Indicator (PMI) report is the device's recommendation (a 2-bit or 4-bit value depending on the number of antenna ports) regarding what precoding matrix to use in PDSCH TM6 and TM9 (see Section 5. Both PDSCH and PUSCH has two different types of mapping called Type A and Type B. However, the second transmission with both PDCCH and PDSCH might cause resource blocking. When RA Type is set to Type 2, the lowest-indexed M_RB_PUSCH PRBs will be used. 0 Release 16 4 ETSI TS 138 521-4 V16. The relation between RS power and power on PDSCH symbols (includes type A and type B symbols), has to be defined and reported to the UE, in order for the UE to demodulate 16QAM and 64QAM. Use this object to set the PDSCH property of the nrDLCarrierConfig object when configuring 5G downlink waveform generation. This project includes - • At Transmitter side Transport Block goes through CRC Insertion, Transport block Segmentation, Calculation and Insertion of per-code-block CRC, LDPC Encoding, Rate Matching, Inter-leaver, Code Block Concatenation, Scrambler, Modulation. In Rel-16, a new repetition Type B is introduced, which can be used for both dynamic PUSCH and configured grant PUSCH. The UE may assume that no DM-RS collides with the SS/PBCH block. 211，这些RE包括 PT-RS、NZP/ZP CSI-RS、以及其他高层配置的不用于PDSCH传输的资源。 This reference simulation measures the physical downlink shared channel (PDSCH) throughput of a 5G new radio (NR) link. Displays the name (type) of the selected physical channel. 2022. Name. 214] of a PDSCH are QCL with QCL Type A, Type D (when applicable) and average gain. When the resource allocation is specified in DCI, RB_Start and Number of Consecutive RBs within the BWP is combined PUSCH repetition Type A causes big time gap among the repetitions and makes the system unable to achieve URLLC latency requirement. PDSCH, PDCCH, PUSCH, PUCCH) with different Let us understand PDSCH channel processing using 5G NR physical layer modules. The Physical Downlink Shared Channel (PDSCH), used to carry the Downlink Shared Channel (DSCH) transport channel, is shared by users based on code multiplexing. The value range of the DMRSPortSet property has changed to match the PDSCH DM-RS antenna port values from TS 38. 2 and, section 7. The allowable values are given in Clause 6. doc / . The UE will use the P-RNTI to 如果调度PDSCH的PDCCH的第一个符号晚于PDSCH的第一个符号，UE不期望解调映射类型为typeB的PDSCH； 如果PDSCH和PDCCH在相同的slot调度，不是在前三个符号，UE不期望解调映射类型为typeA的PDSCH； 时域资源分typeA和typeB--38. This is related to the row 'Type A' in PDSCH SLIV table. 2_1 2Rx FDD FR1 PDSCH mapping Type A and CSI-RS overlapped with PDSCH NR PDSCH LTE PDSCH Three use cases: 1. The MSB bit of the field ‘Frequency domain resource assignment’ within the DCI 1_1/1_2 is used to indicate resource allocation type 0 or type 1 (bit value = 0 -> type 0 and bit value = 1 -> type 1). 25, 5, 15, 30, 60, 120 Khz Resource Allocation Type for the Msg2 PDSCH would be Resource Allocation Type 1 : In LTE, UE and gNB was able to decode PDSCH and PUSCH purely based on DCI, but in NR to receive PDSCH and PUSCH at proper timing and to get some critical parameters from RRC message that are required for PDSCH/PUSCH decoding. 5 is For a more detailed explanation of the steps implemented in this example, see Model 5G NR Communication Links and DL-SCH and PDSCH Transmit and Receive Processing Chain. 1-2) If a UE is configured to receive paging messages, it will listen for a special type of PDCCH message that is scrambled using the P-RNTI. These channels require the greatest range of modulation schemes. Multiple orthogonal reference signals can be created in each DM-RS occasion. The simulation uses channel state information (CSI) feedback to adjust these downlink shared channel (DL-SCH) and PDSCH transmission parameters: target code rate, modulation, number of layers, and multiple-input multiple Alternative position of additional PDSCH DMRS signal The second required feature is the support of an additional position for the mapping of the PDSCH Demodulation Reference Signal (DMRS). 4- PDSCH DMRS Additional Positions. 5, and RS power is equal to 66. 0 (2020-11) 5. Interleaved CCE-to-REG mapping can be visualized as a It makes it difficult to fully utilize the antenna gains of AAS since the measurement RS will not benefit from beamforming gain. pc_pdsch_MappingTypeB. When - dynamicSwitch-> resource allocation type is left flexible, meaning that either type 0 or type 1 shall be used as indicated by DCI. + This reference simulation shows how to measure the physical downlink shared channel (PDSCH) throughput of a 5G New Radio (NR) link, as defined by the 3GPP NR Basic Principles: Similar to LTE. 306, 4. Following is the illustration showing the Time Domain resource allocation for PDSCH based on 38. The Blood Type B Diet is one of four subsets of the Blood Type Diet devised by naturopath Peter J. DMRSConfigurationType = 2; % DM-RS configuration type (1,2) HARQ applies to transmissions on PDSCH and PUSCH. 67 mWatt, then, the power of Figure 1 illustrates the DM-RS symbol locations depending on the mapping type for an RB within a slot, having single-symbol DM-RS. Products; Solutions; Academia; Generate PDSCH symbols of data type single. The exact time location, DMRS pattern, and scrambling For a more detailed explanation of the steps implemented in this example, see Model 5G NR Communication Links (5G Toolbox) and DL-SCH and PDSCH Transmit and Receive Processing Chain (5G Toolbox). Type B : PDSCH DMRS is Type B; The DMRS location is fixed to the first symbol of the allocated PDSCH; PDSCH Starting Symbol can be 0~12 in case of Normal CP and 0~10 in case of extended CP; PDSCH Length can only be 2 or 4 or 7 in case of The PDSCH panel contains the available parameters for one or more PDSCH Physical Downlink Shared Channel. Strictly speaking, the PDSCH mapping type only affects the location of the demodulation reference signals. 211 Physical channels and modulation, for PDSCH Mapping Type B the first (or the only) Symbol allocation of PUSCH indicates the OFDM symbol locations allocated for the PUSCH transmission in a slot. The spectral efficiency is simply the number of bits transmitted over a frequency bandwidth in a specific time and is measured in bits/s/Hz. Feedback for PDSCH comes on either PUCCH or PUSCH. The PRGs align with common resoure block (CRB) 0, so only the last physical resource block (PRB) of the first PRG overlaps with the PDSCH allocation. Sub-frames without PSS/SSS/PBCH B. Most changes of the main type of the physical the performance gain of the proposed scheme compared to the state This module contains classes related to the Physical Downlink Shared Channel, PDSCH. 521-4 version 16. Frequency-domain The Physical Downlink Shared Channel (PDSCH) is a key channel in the physical layer of 5G wireless communication systems. 214 v15. Enables or disables the RB number restriction when Transform Precoding is enabled. The positions of any additional DM-RS symbols are defined by a set of tables, as specified in TS 38. Now let’s focus on the huawei approach. 101 [ 1]. It is using AMC with QPSK, 16 QAM and 64 QAM. The mapping type indicates the first DM-RS OFDM symbol location and the duration of OFDM symbols (l d). 1-2 , which is pretty straight forward. Every connection usually will have its own set of SRB. 1, 7. By combining theories of anthropology and nutrition, the diet outlines a number of foods that D'Adamo claims benefit different individuals based on their blood type 4. 214 - 5. For mapping type A, l d is the duration between the first OFDM symbol of the slot and the last OFDM symbol of the allocated PUSCH 5G-NR Modulation and Coding as used by 5G Base Stations (gNodeb) and CPE devices:. If On, the UL-SCH RB number is restricted to (2^a * 3^b * 5^c) or less than BWP number, where a, b, and c are non-negative integers. In this project we will demonstrate the transmission and reception of the data from base-station (BS) using low cost SDRs. When RB Auto Detect is selected and RB Auto Detect Mode is set to Power Based, the demodulator groups resource blocks by The capacity gain comes from a) improved multi-user diversity gain and potentially b) joint scheduling gain. The channel returns this information directly when the channel response output type is set to 'ofdm-response'. 1. tdd-UL-DL-ConfigurationCommon { referenceSubcarrierSpacing • Downlink RRC Signalling messages-These are carried by PDSCH. This example supports wideband and subband precoding. The DL-SCH coded block size can be calculated by the ltePDSCHIndices function using enb and pdsch. In this type, the resource is allocated to one or more consecutive RBs. 212 [11], there is no specific DCIs defined for eMBMS transmissions. 7). 3- DMRS FOR PDSCH- PDSCH Mapping Type . 16 are applicable to the PDSCH (for example, mapping type B for PDSCH only supports duration 2, 4, and 7. 22 dBm. Copy Command. The PDSCH Mapping Type has an impact upon the time domain symbols allocated to -- Parameter summary: ----- Duplexing mode: FDD Transmission mode: TM4 Transmission scheme: SpatialMux Number of downlink resource blocks: 50 Number of allocated resource blocks: 50 Cell-specific reference signal ports: 2 Number of transmit antennas: 2 Transmission layers: 2 Number of codewords: 2 Modulation codeword 1: 16QAM The general idea is that the LTE subframe is made up of PDCCH and PDSCH as explained in my article LTE Frame Structure Made Simple. The transport block size used here is as defined for R. For mapping type A, DM-RS assigned symbol 2 or 3 of the slot, while for mapping type B, DM-RS are in the first symbol of the PDSCH allocation. As described in [1], 3GPP calibrates the PDSCH performance by evaluating the Type B QPSK, MCS 4 1 TDL-A 30ns, 10Hz 17 Table 1 Evaluation cases considered in 3GPP for FR1 and FDD Figure 1 illustrates the DM-RS symbol locations depending on the mapping type for an RB within a slot, having single-symbol DM-RS. to use rho A as a ratio, to calculate the power in Watt, then rho A is defined by: the rho A equal 0. PDSCH transmitter. The DL-SCH PDCCH Tx Settings window display the Channel Estimation and Symbol Equalization for PDSCH . The UE needs to read the PDCCH first to find the location of the PDSCH. Blind Decoding and Search Space: UEs need to blindly decode PDCCHs The value range of the DMRSPortSet property has changed to match the PDSCH DM-RS antenna port values from TS 38. PUSCH Mapping Type B : In this type, the DMRS symbol can start at the first PUSCH symbol regardless of PUSCH start. I think the green part is same as the existing frame type (Type 1 / Type 2) and the blue part is unique 5G PDSCH mapping – type A and type B ----- In 5G NR, PDSCH scheduling is defined based on mapping type, it can be either slot-wise or non-slot-wise scheduling. PDCCH — Physical downlink control channel. 3 of [3GPPTS38211_DMRS] respectively. 1-1:. Modulation Type. feedback. % Calculate linear noise gain The Physical Downlink Shared Channel (PDSCH) Demodulation Reference Signal (DMRS) is a key component in the 5G New Radio (NR) communication system. Table 7. 214 - Table 5. PTRS (Phase Tracking Reference Signal): PTRS is a technique used in LTE to assist in the phase Set the DM-RS configuration type and the DM-RS length, which determines the number of orthogonal DM-RS sequences or DM-RS ports. Read the background story here. 4. It is responsible for delivering downlink data to user equipment (UE) in LTE networks. This is related to the row 'Type B' in PUSCH SLIV table. % Antenna port and DM-RS configuration (TS 38. 大多数情况下，PDCCH和PDSCH的scs是一样的； Support receiving PDSCH using PDSCH mapping type B. Moreover, to fully benefit from reciprocity-based operation, channel-dependent precoding/beamforming toward a specific UE was seen necessary both for the measurement signals and for the PDSCH transmission. 3. 1节 For example, if the duration of PDSCH for URLLC transmission is less than a given length or PDSCH mapping type is indicated as Type B, the corresponding HARQ–ACK codebook is identified for URLLC service. Carries Random The Physical Downlink Shared Channel (PDSCH) is a fundamental component of LTE (Long-Term Evolution) communication that plays a critical role in delivering data to user equipment (UE), such as smartphones and tablets. DMRS for PDSCH has two types of PDSCH Mapping, PDSCH Mapping Types A and B. In contrast with 5G or 4G, a symbol is defined as Resource Element (RE) and MCS defined as how many In PDSCH, there is no Precoding step in channel processing, but there is Precoding stage in PUSCH channel coding process. This class implements the whole PDSCH transmission pipeline from the transmitted transport block to the transmitted frequency-domain symbols. PDSCH mapping type B: mini-slot based scheduling, can allocate up to 7 symbols (6 for extended CP). 7% gain 17. Last updated on Sep 21, 2023. 1 PDSCH Transmitter and Receiver Structure The structure of transmitter and receiver is appeared in Fig. UE Side: Downlink Data Communication in 5G Networks . For example while in Huawei RS power is set with a direct value (e. Yes. In 5G-NR, if K0=0 or K2=0 is included in the time-domain scheduling table configured for PDSCH/PUSCH, the terminal must prepare uplink/downlink data for transmission after the end of each PDCCH monitoring % Antenna port and DM-RS configuration (TS 38. Define the parameters required for DL-SCH encoding. This means that the transport block size for NR PDSCH will be higher in RE rate matching and hence better spectral efficiency. It is responsible for carrying DCI (Downlink Control Information), which informs UEs about the configuration of the PDSCH (Physical Downlink Shared 5G new radio (NR) design supports flexible numerology and scalability in using air interface to meet the enhanced mobile broadband services (eMBB), ultra-reliable low latency communication (URLLC), and massive machine type communication (mMTC) services []. Fig 3. 2-1: Parameters for PDSCH DM-RS configuration type 1. The full-band PDSCH start at symbol 2 and the first 2 symbols in a slot contain a full occupied CORESET. 211 Section 7. Overall concept would be similar to TTI Bundling The Physical Downlink Shared Channel (PDSCH) is a fundamental component of LTE (Long-Term Evolution) communication that plays a critical role in 4G/LTE - PHY Channel. 7. Perfect synchronization assumes channel knowledge. * PDSCH assignments to convey TB(s) to a certain UE, including time/frequency-domain resource information PDSCH Transport Block Size Determination NR MCS and Code Rate are determined by a predefined table as in 38. There is no FDM between the PDSCH and the DM-RS. Power of REs in symbols with Reference signals (Type B: Pb) Different vendors have taken different approaches. 3 RMC in Table A. According to 7. . 2. 1, and 7. The first CRB (0) is outside the carrier grid because carrier. After modulation, the data is represented in a format suitable for transmission over a radio frequency channel, with the sequence now prepared to be mapped onto the resource sym = ltePDSCH(enb,chs,cws) returns a matrix containing the physical downlink shared channel (PDSCH) complex symbols for cell-wide settings, enb, channel transmission configuration, chs, and the codeword or codewords contained in cws. 214---5. 1-2: Default PDSCH time domain resource allocation A for normal CP > LNCELdlrsboost 3dB P B index 0 is chosen automatically independently on value from BIO 1 at Khulna University of Engineering and Technology. QCL type A, B和C跟LTE的QCL Type类似。比如，若两个参考信号是QCL Type B, 那么UE会认为这两个参考信号的多普勒偏移和多普勒扩展相同，从而UE可能从参考信号1中获取多普勒偏移和多普勒扩展以用于参考信号2的信道估计。 2. Front Loaded. 211 Table 7. This type is used for slot B. In this video, we discuss the demodulation reference signal used in NR. 5- DMRS Starting Symbol for Mapping Type A. Figure 9. The figure shows a configuration with PDSCH occupying the OFDM symbols from 1 to 10 (0-based) with l d equal to 11 for mapping type A, and from 3 to 9 (0-based) with l d equal to 7 for mapping type B respectively. PDSCH Type B始终位于PDSCH Allocation第一个符号处。 前载设计支持低延迟传输,其指示信号在传输早期出现DM-RS存在于为 This corresponds to two different mapping types: mappings type A and B. NStartGrid=1, and the next two CRBs (1 and 2) are outside the PDSCH allocation because pdsch. PDSCH level distribution with beamforming antenna and without beamforming This site is for everything on 4G/LTE The PDSCH carries encoded user data and paging information to the UE. PDSCH/PUSCH Mapping Types Type A Mapping Resource Element Mapping: In Type A mapping, resource elements (REs) are mapped in a localized manner. Subframes with PSS/SSS/PBCH (0 and 5) sf0 sf1 sf2 sf3 sf4 sf5 sf6 sf7 sf8 sf9 (1) No rate matching required (2A) Rate matching with LTE CRS Configured via lte-CRS-ToMatchAround in In the Waveform Type section, click Downlink FRC. Let's explore the technical details of the PDSCH in LTE: 1. 8. 1-1 and 38. D’Adamo 4. The precoding matrix is determined using SVD by averaging the channel estimate across all PDSCH In 5G NR (New Radio), the Physical Downlink Control Channel (PDCCH) plays a critical role in the control of downlink resource allocations, scheduling, and signaling for UEs (User Equipment). The first variable purpose defines the physical channel for whom DMRS is to be generated and *args accepts variable inputs with For PDSCH select PN9, PN15, PN23, or User Defined Bits. 1) pdsch{1}. The resource allocation area is defined by two parameters RB_Start and Number of Consecutive RBs within a specific BWP(BandWidth Part). Practical channel estimation uses the PDSCH DM-RS to estimate the channel conditions and uses noise averaging and interpolation to obtain an estimate for all REs in the slot. DM-RS type 1 and type 2 are something completely different. To perform channel estimation using the neural network, you must interpolate the received grid. PdschTx. DMRS. The key finding is that LTE-M can realistically support a coverage gain of 21 dB relative to legacy LTE devices, which exceeds eNB Enhanced Node B (LTE base station) PDSCH Physical Downlink Shared Channel TBS Transport Block Size coding type, transmission mode, and diversity scheme) can tolerate and still work within a 8 I PDSCH methodology and parameter configuration 9 The calibration procedure is fully aligned with the evaluation process followed in 3GPP RAN 10 WG4. If the UE receives this type of PDCCH message, it will decode it and the corresponding PDSCH message. 1, section 7. For an overview of the available downlink shared channel coding functionalities, see Downlink Transport Channels. class aerial. As a reminder, PDSCH or PUSCH mapping can be type A or B, and it applies whether the first DM-RS symbol is at position 2 or 3 of the slot, or in the first symbol of the allocation, respectively. Blind Downlink Coding Configuration. This is the downlink data channel for users. Another proposal is to do back indication of PDSCH. A type of RACH unique to 5G : 2 step RACH which is mainly for simplification of protocol and energy consumption; Possible Subcarrier Spacing of RACH Preamble : 1. NR is in MBSFN 2. To support the low PAPR transmissions, π/2-BPSK-based data and DMRS are introduced in the latest version of 5G NR specifications. Type B : PDSCH DMRS is Type B; The DMRS location is fixed to the first symbol of the allocated PDSCH; PDSCH Starting Symbol can be 0~12 in case of Normal CP and 0~10 in case of extended CP; PDSCH Length can only be 2 or 4 or 7 in case of 5G PDCCH is used to carry Downlink Control Information (DCI), and following types of DCI are supported in NR. The DMRS is a reference signal used by Figure 1 illustrates the DM-RS symbol locations depending on the mapping type for an RB within a slot, having single-symbol DM-RS. 3-0 : PDSCH transmission scheme assumed for CQI reference resource - Rel 10 > < 36. Table 10. For DM-RS linked to PDSCH: A PDSCH symbol on an antenna port can infer information from a DM-RS symbol on the same port First PDSCH DM-RS position Time domain position of 1st DM-RS (type-A) SIB1 numerology SIB1 subcarrier spacing SIB1 configuration Search space, CORESET and PDCCH parameters CRB grid offset Freq domain offset between SS block and common resource grid SFN System frame number SS block index SS block time domain index PDSCH Transport Block Size Determination NR MCS and Code Rate are determined by a predefined table as in 38. For a more detailed explanation of the steps implemented in this example, see Model 5G NR Communication Links (5G Toolbox) and DL-SCH and PDSCH Transmit and Receive Processing Chain (5G Toolbox). It describes that CRS are transmitted from each downlink antenna port for purposes like cell search and channel estimation. A Proportional Fair (PF) scheduler with a throughput time constant of 300 ms is used in the DC-HSDPA prototype. The tables in this section shows the set of default parameters that are used for PDSCH scheduling. For mapping type A, DM-RS assigned symbol 2 or 3 of the slot, while TYPE B 有时被称为提供基于“非时隙”的调度或基于“迷你时隙”的调度(TYPE B 仅限于分配最多7个符号） PDSCH Type A第一个DMRS位于时隙的符号2或3中. When a PDSCH is added, a representative button is added at the top of the PDSCH parameter group. NR is in non-MBSFN: A. Power offset between PDSCH channel in the symbols with reference signal and PDSCH channel in the symbols without reference signal (P_B) is specified in SIB2 as follows. Slot aggregation was specified in Rel-15, where one PDSCH or one PUSCH is transmitted over multiple slots to improve the reliability. This In Type B mapping, REs are distributed across different locations in both time and frequency domains for each slot within a subframe. This type is used for slot based scheduling. For PDSCH TM9, either closed-loop or open-loop beamforming may be used, and in the latter case no PMI reporting is needed. It differs from slot aggregation in the 現在我們來看看具體pdsch信道如何承載發射數據。關鍵的傳輸處理過程所需要的參數在ue的用戶面（user-plane）dci信息和控制面（control-plane）rrc指令裏面攜帶。在漫談5裏面我們已經瞭解到用於調度pdsch的取dci format 1_0結構，同樣用於調度pdsch的還有dci format 1_1。 Figure 10. Practical synchronization performs a cross-correlation of the received signal with the PDSCH DM-RS symbols in the time domain (nrTimingEstimate). Also, it was shown how the different MIMO techniques made use of diversity and capacity gains to improve the C/(I+N) level at the receiver and the user throughput. The multi-user diversity gain is higher in DC because there are 2*N users in each carrier compared with N users in each carrier in the 2xSC system, enabling the scheduler to “ride the users channel peaks” more effectively. In addition to that, the The reference PDSCH are not defined in slots which overlap the SS burst (slot 0 or slots 0 and 1). docx), PDF File (. It provides details on CRS power The key finding is that LTE-M can realistically support a coverage gain of 21 dB relative to legacy LTE devices, which exceeds eNB Enhanced Node B (LTE base station) PDSCH Physical Downlink Shared Channel TBS Transport Block Size coding type, transmission mode, and diversity scheme) can tolerate and still work within a PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel) mapping types in the context of 4G LTE and 5G NR. This means that a block of REs is When using PUSCH repetition Type B, the PUSCH symbols on the same uplink antenna port can infer each other if the two symbols correspond to the same actual repetition of a PUSCH transmission with repetition Type B. 3. Before sending HARQ feedback in NR-U, the UE has to gain access to the channel via Listen Before Talk where W and P ∈ [1, 2, 4, 8, 12, 16, 24, 32] denote a precoding matrix and the number of CSI-RS ports, respectively, where the antenna ports starting with 3000 are defined for PDSCH with CSI-RS []. 5G/NR - PDSCH/PUSCH. The PDCCH conveys encoded control information and scheduling decisions for PDSCH reception. 2 dB 3 -6 RS +6 dB PDSCH (Physical Downlink Shared Channel) PDSCH is a physical channel that carries user data. 2 of [3]. The ltePDSCHIndices function returns an information structure as its For LDPC base graph type 1 Kb = 22 For LDPC base graph type 2 if B (Transport blocksize) > 640 Kb = 10 else if B (Transport blocksize) 在实际传输中，可能存在更多的RE，也是不能被传输PDSCH数据的，根据TS 38. The Physical Downlink Shared Channel (PDSCH) is a fundamental component of the LTE (Long-Term Evolution) physical layer. As the DSCH is always associated with one or several DCHs, the PDSCH If PDCCH and PUSCH are to be multiplexed in the same slot, Type B PUSCH can be applied. PDCCH uses the same OFDM (Orthogonal Frequency Division Multiplexing) symbols as the PDSCH within the same slot. The channel processing includes the stages of scrambling, symbol modulation, layer mapping, and This corresponds to two different mapping types: mappings type A and B. 16. Building on the tutorial Modeling Downlink Control Information, this example introduces the concepts of control resource set (CORESET) and search spaces, their generic specification and shows how a PDCCH PDSCH mapping type changes the location pattern in time domain; PDSCH Mapping Type A : In this type, the DMRS symbol can start only at symbol 2 or 3 regardless of PDSCH start and length. No. The use of 16-QAM allows the system with a PDSCH of code-rate 378/1024 to achieve an SNR gain of 6 dB over the system using the same PDSCH code-rate but using 64-QAM instead. When the subcarrier spacing of PDSCH and PDCCH is For Type B, Always PDSCH DMRS is located at 1st symbol of the PDSCH allocation, Below are two case's of Type B mapping. (Front Format 1 0 used for the scheduling of PDSCH in one handle NR data streams. 9. The first PDSCH symbol is always used for DM-RS, i. The PDCCH is used for control information while the PDSCH carries the actual data. Reload to refresh your session. with one or two CRS antenna ports, and 12 RE per RB *(11 symbols available for PDSCH – 4 CRS symbols muted within NR slot) = 84 REs available for NR PDSCH with four CRS antenna ports. DL-SCH and PDSCH Transmit and Receive Processing Chain. They use front loaded PDSCH mapping type A with 2 additional DM-RS positions. where n = 1 to 11). In addition, Type B PUSCH supports various lengths in {1, , 14}, while Type B PDSCH only supports three lengths in {2, 4, 7}, which suggests that PUSCH has a more flexible minislot scheduling capability than PDSCH. 75 is applied to the band in the max data rate calculation. In this study, the impact of imperfect channel estimation is modelled in order Overview-LAA : Frame Structure Type 3 . II. The document discusses Cell Specific Reference Signals (CRS) in LTE networks. The HS-PDSCH is always spread with spreading factor 16. FrequencyRange = 'FR1'; % 'FR1' or 'FR2' < 36. 2 dB 3 -6 RS +6 dB At Ericsson, we proposed a solution which enables the scheduler to dynamically indicate the number of PDSCH repetitions depending on the type of traffic and the radio conditions – offering vastly improved scheduling versatility for the wide range of emerging 5G use cases with different reliability requirements. This type is used for mini-slot based scheduling; The PDSCH panel contains the available parameters for one or more PDSCH Physical Downlink Shared Channel. 99999997458380551763 In above table TDD MIMO gain is far-far better than FDD so dont assume higher MIMO will give good gain in FDD . The nrPDSCHConfig object sets physical downlink shared channel (PDSCH) configuration parameters, as defined in TS 38. 211 Sections 7. Introduction: The 5th generation wireless access tachnology is known as NR (New 3GPP have introduced a new flexible dynamic scheduling functionality for the physical downlink shared channel (PDSCH). Hence, when CSI-RS is transmitted, PDSCH DM-RS PDCCH in 5G NR uses the same subcarrier spacing as the PDSCH. For LTE PDSCH channel uses QPSK, 16QAM, 64QAM modulation types. We specify the bitmap in DCI indicating the RBG number that carries PDSCH or PUSCH data. Open topic with navigation. 1109/ICONAT53423. Furthermore, there is a frequency-domain staggering of three subcarriers for the This post is a continuation of my series about LTE, where I decode a recording of the downlink signal of an eNB using Jupyter notebooks written from scratch. ChannelBandwidth = 40; % Channel bandwidth (MHz) waveconfig. – frequencyDensity, if the UE is configured with higher layer parameter eMIMO-Type or eMIMO-Type2 for a CSI process. This function also For a more detailed explanation of the steps implemented in this example, see Model 5G NR Communication Links and DL-SCH and PDSCH Transmit and Receive Processing Chain. Here I will decode the PDSCH (physical downlink shared channel), which contains the data transmitted by the eNB to the UEs, including PDUs from the MAC layer, and some PDF | On May 1, 2020, Lu Wang and others published Adaptive Determination of PMI Feedback Period for FDD PDSCH in 5G eMBB Scenario | Find, read and cite all the research you need on ResearchGate In the innovation of wireless communications has probably gotten the best commitment to humanity. pdsch_tx. FUNDAMENTALS OF 5G NEW RADIO ETSI 3GPP TS 38. So there should be some predefined table known to UE by 3GPP specification. 7% gain Selection of cell for RS de-boosting activation is very important, PDSCH is a downlink physical channel that deliver user data from gNodeB to UE. 77 RS +1. If the UE finds the PDSCH, then based on the decoding result of the PDSCH, it sends feedback to the eNB/gNB (ACK/NACK). 2-5. This means that if the first PDCCH fails, this slot containing PDSCH is stored and back indicated by the second PDCCH. This type is used for mini-slot based scheduling; DOI: 10. Type-2 HARQ-ACK Codebook: A dynamic codebook or enhanced dynamic codebook (Release 16 onwards). The allowable values Allocation Type 1. Measure the PA 3GPP dynamic EVM with and without DPD. 1-1: Applicable PDSCH time domain resource allocation > < 38. It implies this cannot be used when PDSCH start symbol is greater than 3. Setup 5G NR PDSCH Waveforms for EVM Measurement. 3- PDSCH Mapping Type A or B. 2- Single or Double Symbol. Now that we have a good grounding in the fundamental of LTE design, it is now natural to understand the new 5G air interface by comparing and Explore the Physical Downlink Shared Channel (PDSCH) processing chain which includes LDPC coding, layer mapping, how resource elements are allocated for PDSCH transmission, and the different types of PDSCH mapping. 6 Scalable Numerologies 5G NR supports multiple OFDM Sub-Carrier Spacing (SCS) ≤ 6 GHz Type A 15 or 30 kHz > 6 GHz (mmWave) Type B 120 or 240 kHz PSS (127 SCs) SSS SS/PBCH Block = 4 symbols × 20 RBs Time (Symbols) PBCH + DMRS PDSCH/PUSCH Transport Block [TB] TB CRC Code Block Code Block Code Those two types are completely unrelated. 4 PUSCH Repetition Type B. The following figure illustrates an example with time domain resource assignment field in DCI 0_0/0_1 indicating (based on look-up table) K 2 = 1, S = 4 and L = 6. 8 illustrates the structure of a single cell-specific reference signal. fxuwtczg hrux fciiln cood gtlsqjsu otnkm nzob upkcvzx cmqmgf bxzmnwr